Can I overwrite the string form of a namedtuple?
Yes, it is not hard to do and there is an example for it in the namedtuple docs.
The technique is to make a subclass that adds its own str method:
>>> from collections import namedtuple
>>> class Spoken(namedtuple("Spoken", ["loudness", "pitch"])):
__slots__ = ()
def __str__(self):
return str(self.loudness)
>>> s = Spoken(loudness=90, pitch='high')
>>> str(s)
'90'
Update:
You can also used typing.NamedTuple to get the same effect.
from typing import NamedTuple
class Spoken(NamedTuple):
loudness: int
pitch: str
def __str__(self):
return str(self.loudness)
You can define a function for it:
def print_loudness(self):
return str(self.loudness)
and assign it to __str__
:
Spoken.__str__ = print_loudness